Input and output, you can also use different input and output combinations to get a reverberation effect,Such as: mono input stereo output, left channel input left channel output,Left channel input and right channel output, right channel input and right channel output Dual reverb mode selection,Large Atmosphere Reverb & Infinite Reverb,The reverberation effect is ethereal and magnificent, the sound texture is hollow and diffuse, and it is diffuse and very enveloping BYPASS mode selection - supports Trail Bypass Multiple adjustable parameters - DECAY/DAMPLING/PRE-DELAY Compact structure - small size/easy to carry Product name:Stereo Reverb Effector resistance:1MQ(input);1KQ(output) current:200mA (max) power supply:DC9V effect pedal dedicated adapter (positive outside and negative inside), cannot be installed with batteries (power supply not included in package) The product appearance and printed words depending on batch, but this does not affect use. Colour:As Shown Material:Metal Package Contents: 1 * Stereo Reverb Effector Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.